<template>
  <div class="login-container">
    <div class="login-form-container">
      <el-form
        ref="loginForm"
        :model="loginForm"
        :rules="loginRules"
        class="login-form"
        auto-complete="new-password"
        label-position="left"
      >
        <div class="title-container">
          <h3 class="title">机房服务管理系统登录</h3>
        </div>

        <el-form-item prop="username">
          <span class="svg-container">
            <svg-icon icon-class="user" />
          </span>
          <el-input
            v-model="loginForm.username"
            placeholder="请输入用户名"
            name="username"
            type="text"
            tabindex="1"
            auto-complete="new-password"
          />
        </el-form-item>

        <el-form-item prop="password">
          <span class="svg-container">
            <svg-icon icon-class="password" />
          </span>
          <el-input
            :key="passwordType"
            ref="password"
            v-model="loginForm.password"
            :type="passwordType"
            placeholder="请输入密码"
            name="password"
            tabindex="2"
            auto-complete="new-password"
            @keyup.enter.native="handleLogin"
          />
          <span class="show-pwd" @click="showPwd">
            <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
          </span>
        </el-form-item>
        <!-- 角色选择 -->
        <el-form-item prop="roles">
          <span class="svg-container">
            <svg-icon icon-class="user" />
          </span>
          <el-select
            v-model="loginForm.roles"
            filterable
            placeholder="请选择你的身份"
          >
            <el-option
              v-for="role in loginForm.role_selsct"
              :key="role.id"
              :label="role.name"
              :value="role.value"
            />
          </el-select>
        </el-form-item>
        <!--  -->
        <div class="button-container">
          <el-button
            :loading="loading"
            type="primary"
            style="width:100%;margin-bottom:30px;"
            @click.native.prevent="handleLogin"
          >登录</el-button>
          <router-link to="/register" replace>
            <el-button
              :registering="registering"
              type="primary"
              style="width:100%;margin-bottom:30px;"
              @click="handleRegister"
            >注册</el-button>
          </router-link>
        </div>
      </el-form>
      <div>
        <!-- 验证码组件 -->
        <Vcode :show="isShow" @success="onSuccess" @close="onClose" />
      </div>
    </div>
  </div>
</template>

<script>
import { validUsername, validUserpassword, validUserroles } from '@/utils/validate'
import Vcode from 'vue-puzzle-vcode'
import { removeToken, removeRoles, removeId } from '@/utils/auth'

export default {
  name: 'Login',
  components: { Vcode },
  data() {
    /*
    代码中的validator: validUsername、validator: validatePass都是属于自定义的规则，需要我们自己定义，如下：
    */
    const validateUsername = (rule, value, callback) => {
      // validUsername方法定义在tuils当中，用于判断用户名是否正确。
      if (!validUsername(value)) {
        callback(new Error('请输入正确的用户名！'))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      /* 后续验证的时候，要先使用加密算法对密码进行加密，
          然后加密后的密码用于跟数据库进行比对 */
      if (!validUserpassword(value)) {
        callback(new Error('请输入正确的密码！'))
      } else {
        callback()
      }
    }
    const validateRoles = (rule, value, callback) => {
      if (!validUserroles(value)) {
        callback(new Error('请选择您的身份！'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        username: '',
        password: '',
        role_selsct: [
          {
            id: 1,
            name: '师生',
            value: 'USER'
          },
          {
            id: 2,
            name: '机房管理员',
            value: 'ADMIN'
          },
          {
            id: 3,
            name: '超级管理员',
            value: 'SUPER_ADMIN'
          }
        ]
      },
      loginRules: {
        username: [{ required: true, message: '请输入你的姓名', trigger: 'blur' }],
        password: [{ required: true, trigger: 'blur', message: '请输入你的密码' }],
        roles: [{ required: true, trigger: 'blur', message: '请选择身份' }]
      },
      isShow: false,
      loading: false,
      passwordType: 'password',
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  methods: {
    refresh() {
      location.reload()
    },
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    handleLogin() {
      console.log('登陆按钮！')
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          this.$store.dispatch('user/login', this.loginForm).then(() => {
            // 尝试将router放在user/login中，解决异步问题。
            this.$router.push({ path: this.redirect || '/' })
            this.loading = false
          }).catch(() => {
            this.loading = false
          })
          this.isShow = true
        } else {
          console.log('error submit!!')
          return false
        }
      })
    },
    handleRegister() {
      this.$router.push({ name: 'register' })
    },
    onSuccess() {
      this.refresh()
      this.isShow = false
      // 可以在此加上axios或其他代码
    },
    onClose() {
      this.isShow = false
      removeRoles()
      removeToken()
      removeId()
      this.$message({
        message: '取消验证！',
        type: 'warning'
      })
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 90%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }
  .el-select{
    display: inline-block;
    height: 47px;
    width: 90%;
  }

  .button-container {
    display: flex;
    /* 启用 Flexbox 布局 */
    align-items: center;
    /* 垂直居中对齐 */
    column-gap: 10px;
    /* 设置按钮之间的列间隙 */
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;
  margin: auto;
  background-size: 100% 100%;
  background-repeat: no-repeat;
  background-image: url("../../assets/Login-background3.jpg");
  /* 设置.login-form-container的样式 */
  .login-form-container {
    width: auto;
    height: 400px;
    border-radius: 15px;
    border: 1px solid #ccc;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(52, 64, 105, 0.5); /* 设置背景颜色和透明度 */
    padding: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1); /* 添加阴影效果 */

    .login-form {
      position: relative;
      width: 520px;
      max-width: 100%;
      margin: 0 auto;
      overflow: hidden;
    }
    .tips {
      font-size: 14px;
      color: #fff;
      margin-bottom: 10px;

      span {
        &:first-of-type {
          margin-right: 16px;
        }
      }
    }

    .svg-container {
      padding: 6px 5px 6px 15px;
      color: $dark_gray;
      vertical-align: middle;
      width: 30px;
      display: inline-block;
    }

    .title-container {
      position: relative;

      .title {
        font-size: 26px;
        color: $light_gray;
        margin: 0px auto 40px auto;
        text-align: center;
        font-weight: bold;
      }
    }

    .show-pwd {
      position: absolute;
      right: 10px;
      top: 7px;
      font-size: 16px;
      color: $dark_gray;
      cursor: pointer;
      user-select: none;
    }
  }
}
</style>
